Operating mechanism



g- 12, 1952 K.' H. POND 2,606,534

' OPERATING MECHANISM Filed May 20, 1948 2 SHEETSSHEET 1 if E151] IN VEN TOR.

Aug. 12, 1952 K. H. POND OPERATING MECHANISM 2 SI-IEETS-SI-IEET 2 Filed May 20, 1948 BY 6 A2 Patented Aug. 12, 1952 UNITED STATES PAT ENT "ICE "OPERATING MECHANISM Kenneth .H.P0l1d, LongmcadowpMass.

" ApplicationMay 20, 1948; SerialNo1-2 8;--183 2. Claims.

"This invention relates to"improvements in'an oscillating operating mechanism for oscillating a member back and forth.

"The principal object of theinvention is directed to the provision of an operating mechanism which is adapted to oscillate a member such as a shaft back and forth and is'actuated'by air "pressure or the like. The mechanism is characterized by means for varying the speed of the member which is'oscillated thereby.

The mechanism is adapted for various uses where it is desired to impart oscillations in opposite directions to a member.

As an example, the mechanism may be employed to oscillate theshaft of a drill press which actuates the quill to move the tool toward and into the work and away therefrom and accord- "ing to novel features the mechanism operates to move the tool to the work at a high speed and then into the work at a relatively slow speed.

With the foregoing and various other novel *features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel featuresof construction and in the combination and arrangement of parts as will be hereinaftermcre particularly pointed out in the claims hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein;

- Fig. 1 is a longitudinal sectional view through the operating mechanism of the invention;

the invention will be fully described.

A housing for the'mechanism of theinvention includes a forward end cap 2, a rearend cap 4, intermediate sections 6 and amine 8.

A drive shaft 1 2 is rotatable in the housing and forward and rear-"glands l4 and I6 are provided in connection with suitable packings-IB and 26 for sealing the shaft l2.

The shaft 12 has a longitudinal bore 22 as ;shown and at one end receives a shaft 24 which is to be oscillated. This shaft 24 maybe the -shait'of adrill press-for operating the quill :thereof. A rod 26 hasa lower threaded portiontlizs These members are secured together by screws or bolts which may extend through'marginalportions 1 thereof.

' pilot po'rtion 30ina suitable socket 'of shaft 24. By thismeans shafts lland flare-heldagainst 1 relative rotation.

As will be seen, the ring 8=tormsinconnection with members 2 and an adjacent member G-a. circular chamber "312 whilethe-member" kis'formed to cooperate" with the othewof: the: members 6 to form another chamber-34. "These5chambers are separate and may be'ca'l-led" operating and control members respectively.

- Packing 36 or suitableform is dispos'ed around the shaft l2, as shown.

A propeller 43, see Figs. 1 andffiir-hasa tongue 52 which extends 'intoi'shaft I 2- s05 thatlther said shaft may be oscillatedby-itherpropeller. Cup packings" 44 are secured to-opposite-faces of the propeller 2E) and mayi'be made :irom yi'elda'ble material as is usual and-I these engagethe walls of the chamber 32.

. A partition 46 'disposedtin'chamber "3 2'. is'flxed to member 8 lay-means of 'screws"" 48"or' theLlike and it has cup pa'ckings'ifill*securedrto opposite sides thereof.

Inlet ports"52 and-$54 are providediin'member 8 which lead into chamber.32tafibppo'site sides of" partition.

The ports 52* andi'li iiwilltbeconnected to pressure means such as" a pump: or "compressor" for delivering fluid und'en pressure. .j'Pressure control means such as 'valve means'wlll' be" included in the pressure means sothat pressure will be cured to shaft l2 by means of: a: screw or screws such as 64. A valve 66 has a stem 'lllslidably extending through the vane 62*ande a spring I l around said stem aiiil and' 'disposed between the vane and a head 'l2-u-rges theyalvetoexposition over ports 14' through the-vane.

The chambered-is filled with-oil or' the like and as'shaft I2 is oscillatedby the-propeller the vane is oscillated b ack andj 'forthiim the chamber.

-Axplug Ell is secured in the end-of 'shaft' 1 2 turn therewith and has a central bore 82. Ports 84 and 84' extend from the bore 82 through the plug and shaft I2 into chamber 34 at opposite sides of the vane 62.

A valve member 86 has a portion 88 in threaded engagement with the bore 82 of plug 80 and a conical end 90 adapted to engage a seat 92 at the inner end of bore 82.

As the shaft I2 and vane 62 move counterclockwise, oil in chamber 34 is forced to move through port 84 and out port 84' except as it is controlled by valve member 86. Communication between ports 84 and 84' is controlled by valve 86 and thereby the speed of movement of the shaft I2 counterclockwise may be varied according to the adjustment of valve 86.

As the shaft I2 and vane move clockwise, oil in chamber 34 between the vane and wall 60 passes a slower speed. This is accomplished by means to be described in connection with Figs. 1 and 3.

A plug I is provided in member 4 which has a bore I82 and a forward plate I04 secured to said member 4. Grooves I06 in the sides of plug I 00 are provided which in conjunction with ports I08 provided passageways from the bore I02 to the chamber 34.

The plug. I00 is so positioned with reference to wall 60 of chamber 34 that the grooves I06 are at oppositesides thereof. Thereby the bore I02 of the plug is in communication with the chamber at opposite sides of said wall 60.

A valve H0 is slidable in bore I02 of plug I00 and operates against a spring II2. When the valve is in inner position the ports I08 are closed off so that communication between bore I02 and chamber 34 is interrupted.

A cam plate H4 is provided which has a circumferential slot H6. Screws II8 extending through the slot II6 engage the end of shaft I2. By means of the screws and slot, the cam may be adjusted angularly relative to shaft I2.

A cam,I I8 on the plate is formed to engage the valve IIO as the shaft I2 oscillates counterclockwise and depress said valve and close off communication between bore I02 and chamber 34 or, close .communication between opposite sides of wall 60.'.

.With a shaft such as 24 secured to shaft I2 and pressure delivered alternately to ports 52 and 54 of chamber 32, the propeller is acted upon to oscillate shaft I2 in opposite directions. Valve 66 is adjusted so that the desired speed of operation is attained. The cam H4 is adjusted so that valve H0 is operated thereby in such a manner that the shaft I 2 as it is oscillated in one direction willoperate at an initial speed which is relatively greater than the subsequent speed thereof. I V

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely-as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all modifications I and variations as. fall within the meaning and purview and range of equivalency of the appended claims are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

1. Fluid actuated operating mechanism for oscillating a member back and forth comprising in combination, a housing construction having separate aligned annular pressure and closed control chambers for fluid, a drive shaft oscillatable in said housing and disposed centrally of said chambers, said pressure chamber having a radially disposed wall fixed therein between said shaft and a side of said chamber, means limiting the angle of oscillation of said shaft, a propeller in said pressure chamber fixed to said shaft, said housing provided with inlets for fluid into said pressure chamber disposed adjacent and at opposite sides of said wall whereby fluid delivered alternately to said inlets acts on and oscillates said propeller and shaft in opposite directions, a radially disposed partition wall fixed in said control chamber disposed between said drive shaft and a side of said chamber providing opposite ends to said control chamber, a vane in said control chamber fixed to and oscillated by said shaft back and forth from one side of said partition wall to the other side thereof for displacing fluid in said chamber, said vane provided with a valved opening therethrough arranged and adapted as the vane is oscillated alternately in opposite directions to permit and prevent the flow of fluid therethrough, said shaft provided with passage means in communication with opposite ends of said control chamber for fluid displaced by said vane, and manually adjustable means operable in said passage means to vary the flow of fluid therethrough and the speed of oscillation of said vane, said housing construction provided with passage means in communication with opposite ends of said control chamber, a valve construction having a movable valve member in said last named passage means to close and open the same to prevent and permit the flow therethrough of fluid displaced by said vane and thereby in addition to the manually adjustable means to vary the speed of oscillation of said vane, and a member adjustable on said shaft for operatively engaging said valve member.

2. Fluid actuated operating mechanism for oscillating a member back and forth comprising in combination, a housing construction having separate aligned annular pressure and closed control chambers for fluid, a drive shaft oscillatable in said housing and disposed centrally of said chambers, said pressure chamber having a radially disposed wall fixed therein between said shaft and a side of said chamber, means limiting the angle of oscillation of said shaft, a propeller in said pressure chamber fixed to said shaft, said housing provided with inlets for fluid into saidpressure chamber disposed adjacent and at opposite sides of said wall whereby fluid delivered alternately to said inlets acts on and oscillates said propeller and shaft in opposite directions, a radially disposed partition wall fixed in said control chamber disposed between said drive shaft and a side of said chamber providing opposite ends to said control chamber, a vane in said control chamber fixed to and oscillated by said shaft back and forth from one side of said partition wall to the other side thereof provided with passage means in communication with opposite ends of said control chamber for fluid displaced by said vane, and manually adjustable means operable in said passage means to vary the flow of fluid therethrough and the speed of oscillation of said vane, said housing construction provided with passage means in communication with opposite ends of said control chamber, a valve construction having a movable valve member in said last named passage means to close and open the same to prevent and permit the flow therethrough of fluid displaced by said vane and thereby in addition to the manually adjustable means to vary the speed of oscillation of said vane, and a member adjustable on said shaft for operatively engaging said valve member.

KENNETH H. POND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Thompson Sept. 1, 1908 Anderson Jan. 21, 1913 Cheney Mar. 2, 1915 Arnold Aug. 4, 1925 Schlagenhauf Dec. 13, 1927 Tibbetts Dec. 1, 1931 McKee Mar. 28, 1933 Fieldman Feb. 12, 1935 Horlacher July 4, 1939 Davis Apr. 23, 1940 Racial Aug. 10, 1943 Parker May 30, 1944 Van Almelo Jan. 18, 1949 

